Fourthline’s Documents products offer peace of mind that you are onboarding clients with valid, authentic, and uncompromised ID documents. We support a wide variety of passports, driving licenses, national ID cards, and residence permits.

We offer the following:

Product	Description
Document Photo	The client provides photos of their ID document. We check that the document is fully visible and valid, and then extract the document data.
Document Liveness	We record a 10-second video of the ID document, and then check any security features and that the document is authentic.
Document NFC	We check if the NFC chip embedded in the ID document is authentic and uncompromised, and then extract and verify the data.

Document Photo

The client provides photos of their ID document (at least 1 per side) and we check that the document is fully visible and valid, and then extract the document data.

When the client enters the module, they first select the issuing country of their ID document and then the document type from the list of supported ID documents for that country.

Document selection — Client selects ID document issuing country and type

The client positions their ID document within the mask and the photo is either auto-captured (if supported) or the client taps the button (can vary per integration option). The client confirms the photo or tries again.

Fourthline extracts the client’s personal data from the MRZ and/or VIZ and displays the details. The client confirms the document details or tries again.

If configured, the client enters their contact details.

Fourthline performs the following checks:

Check	Description	Required
Self-capture	The client took the document photos themselves during the workflow using the device camera, and they were not inserted via captures, camera roll or library sources, or by any third party.
Image quality	Good quality photos of all required sides of the document are provided so that we can assess it correctly.
Personal data	All data groups are present and correct any typos or misread data, following the International Civil Aviation Organization (ICAO) transliteration standard in Doc 9303: Machine Readable Travel Documents.
Validity	The ID document is currently valid.
Age	The client is the minimum supported age or older.
Supported document	You and Fourthline both support the document type and issuing country.
Document condition	The document is in acceptable condition.
Document address	If present, Fourthline can extract the client's address from the ID document as raw data.
Document issuing country	If the client doesn't specify the issuing country in the UI, Fourthline can extract it from the document.
Diacritics	Fourthline can recognize special characters with diacritics in the VIZ and share the raw data with you.

More information

For the complete list of supported ID documents and all checks we perform, request our CDD Policy from your implementation manager.

Second ID document

If a country requires clients to provide a photo of a second ID document, you can include an additional module that follows the same capture flow as the primary document.

A Fourthline human agent performs the following checks:

Check	Description	Required
Genuine photo	The photo is of the actual ID document, not a photo of a photo.
Image quality	The image quality of the photo is acceptable.
Validity	The ID document is valid at the time of the product flow.
Document condition	The ID document is in acceptable condition.
Portrait match	The person in the document portrait is the same as the primary ID document.
Supported document	You and Fourthline both support the document type and issuing country.

Tax number

If you need to collect the client's TIN and any other tax information, you can include an additional module to capture this from the relevant document.

Leverage Fourthline's expert knowledge of market-specific requirements regarding document types and TINs. Our SDK UIs offer customized flows for:

Dutch burgerservicenummer (BSN)
Italian codice fiscale
Spanish número de identificación fiscal (NIF), Documento Nacional de Identidad (DNI), or número de identidad de extranjero (NIE)

The client enters the TIN module, takes photos of the required side(s) of the document, and confirms the number has been correctly extracted.

Biometrics Component — Market-specific UI

Document Liveness

While the client takes the document photo(s), Fourthline records a 10-second video.

In addition to the Document Photo checks, we perform the following checks:

Check	Description	Required
Genuine video	The document video is authentic and not a video of a video. A human agent checks for deep fakes.
Security features	The security features are present and clearly visible in the document photos and video. If our AI agent cannot detect them, a human agent reviews the images.
Authenticity	The ID document is authentic based on the photo(s) and video.

Document NFC

Fourthline checks if the client's ID document contains an embedded NFC chip and if their device supports near-field communication (NFC). If supported, the client enters the NFC module and is guided to scan the chip with their device.

Document NFC increases security and enables more automation for faster processing, but adds some friction to the user experience.

Fourthline uses the ID document number and expiry date, and the client’s date of birth extracted during Document Photo or Liveness to create a key to unlock the chip. If we can't create a key, we use the card access number (CAN) provided by the client or in the VIZ. We extract the chip data and display it to the client to confirm.

Fourthline checks that the chip is authentic and uncompromised. We ensure that all data groups are available, and then extract and cross-check the following data against the MRZ and VIZ, relying most on the chip data quality:

First and last name(s) and full legal name
Date of birth
Sex
Document number and type, issuing country, issue date (if present) and expiry date
Nationality
Place of birth (if present)

We check that the color portrait of the client on the chip matches the monochrome portrait on the ID document.

Next steps

Learn how to combine these products in your Identity Verification solution.

Get in touch

Top of page